iTunes Connect 错误：“应用内购买已被退回”

解决 “应用内购买已被退回” 错误的方法

swift
// 导入 StoreKit 框架
import StoreKit
// 遵循 SKProductsRequestDelegate 协议
class MyStoreDelegate: NSObject, SKProductsRequestDelegate {
    func request(_ request: SKRequest, didFailWithError error: Error) {
        // 处理请求失败的情况
        print("请求失败：\(error.localizedDescription)")
    }
    
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        // 处理请求成功的情况
        let products = response.products
        for product in products {
            print("产品 ID：\(product.productIdentifier)")
            print("产品标题：\(product.localizedTitle)")
            print("产品描述：\(product.localizedDescription)")
            print("产品价格：\(product.price)")
        }
    }
}
// 创建请求对象
let request = SKProductsRequest(productIdentifiers: ["com.example.product1", "com.example.product2"])
// 设置请求的代理
let delegate = MyStoreDelegate()
request.delegate = delegate
// 发送请求
request.start()

swift
// 导入 StoreKit 框架
import StoreKit
// 遵循 SKPaymentTransactionObserver 协议
class MyPaymentObserver: NSObject, SKPaymentTransactionObserver {
    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            switch transaction.transactionState {
            case .purchased:
                // 处理购买成功的情况
                print("购买成功，交易 ID：\(transaction.transactionIdentifier)")
                // TODO: 提供购买内容
                // ...
                // 完成交易
                queue.finishTransaction(transaction)
            case .restored:
                // 处理恢复购买的情况
                print("恢复购买，交易 ID：\(transaction.transactionIdentifier)")
                // TODO: 提供购买内容
                // ...
                // 完成交易
                queue.finishTransaction(transaction)
            case .failed:
                // 处理购买失败的情况
                print("购买失败，错误信息：\(transaction.error?.localizedDescription ?? "")")
                // 完成交易
                queue.finishTransaction(transaction)
            default:
                break
            }
        }
    }
}
// 将自己设为支付队列的观察者
SKPaymentQueue.default().add(MyPaymentObserver())
// 发起购买请求
let productID = "com.example.product1"
let payment = SKPayment(productIdentifier: productID)
SKPaymentQueue.default().add(payment)